1 Features

• Input Voltage Range: 4.5 V to 17 V

• Output Voltage Range: 0.25 V to 5.5 V

• Intel® VR13.HC SVID Compliant

• Dual Output Supporting N+M Phase

Configurations (N+M ≤ 8, M ≤ 4)

• Enhanced D-CAP+™ Control to Provide Super

Transient Performance with Excellent Dynamic

Current Sharing

• Programmable Loop Compensation

• Programmable Phase-Firing Order

• Individual Phase Current Calibrations and

Reporting

• Dynamic Phase Shedding with Programmable

Thresholds for Optimizing Efficiency at Light and

Heavy Loads

• Fast Phase-Adding for Undershoot Reduction

(USR)

• Driverless PWM Architecture for Efficient High-

Frequency Switching

• Fully Compatible with TI NextFET™ Power Stage

for High-Density Solutions

• Accurate, Adjustable, Adaptive Voltage Positioning

(AVP)

• Patented AutoBalance™ Phase Current Balancing

• Cycle-by-cycle Per-Phase Current Limit

• PMBus™ v1.3.1 System Interface for Telemetry of

Voltage, Current, Power, Temperature, and Fault

Conditions

• 5 mm × 5 mm, 40-Pin, QFN Package

2 Applications

• Data center & enterprise computing rack server

• Hardware accelerator

• Network interface card (NIC)

• ASIC and high-performance client

3 Description

The TPS53688 is a fully VR13.HC SVID compliant

step-down controller with two channels, built-in nonvolatile

memory (NVM), and PMBus™ interface, and is

fully compatible with TI NexFET™ smart power

stages. Advanced control features such as the D-CAP

+™ architecture with undershoot reduction (USR)

provide fast transient response, low output

capacitance, and good dynamic current sharing. The

device also provides a novel phase interleaving

strategy and dynamic phase shedding, for efficiency

improvement across loading conditions. Adjustable

control of output voltage slew rate and adaptive

voltage positioning are natively supported. In addition,

the device supports the PMBus communication

interface, for reporting the telemetry of voltage,

current, power, temperature, and fault conditions to

the host system. All programmable parameters can be

configured through the PMBus interface and stored in

NVM as new default values, to minimize the external

component count.

The TPS53688 device is offered in a thermally

enhanced 40-pin QFN packaged and is rated to

operate from –40°C to 125°C.